Does Cardinal Roger M. Mahony deserve a prison scentence?

More evidence has emerged that the Catholic Church enabled and covered up the criminal acts of paedophile priests. From the New York Times:

"The retired archbishop of Los Angeles, Cardinal Roger M. Mahony, and other high-ranking clergymen in the archdiocese worked quietly to keep evidence of child molesting away from law enforcement officials and shield abusive priests from criminal prosecution more than a decade before the scandal became public, according to confidential church records."

"Rather than defrocking priests and contacting the police, the archdiocese sent priests who had molested children to out-of-state treatment facilities, in large part because therapists in California were legally obligated to report any evidence of child abuse to the police, the files make clear."

Did Cardinal Mahony and other high-ranking clergymen break the law?

If so, what law? If not, should there be a law against what they have done?

It seems the statute of limitations in California for obstruction of justice is three years, which limits the prosecutor's options. They could still be charged but some political and legal acrobatics would be required first. The California state legislature could pass a special measure that temporarily lifts the statute of limitations for obstruction of justice and criminal conspiracy. They've taken similar steps before and for similar reasons.